Zarif said Washington had failed to honor its end of the deal, asserting that Tehran was not surprised by the failure.

Mogherini, on the other hand, said she was confident that the US will keep “something that is working,” asserting that “in any case the European Union will guarantee that the deal keeps.”

Trump has made a major reversal on Obama’s Middle East policies. His first foreign trip was dedicated to encouraging regional Arab nations to stand in “unity” with Israel against Iran, according to American officials.